/Engine/Source/Runtime/Engine/Classes/GameFramework/PlayerController.h
Called when the local player is about to travel to a new map or IP address. Provides subclass with an opportunity to perform cleanup or other tasks prior to the travel.
virtual void PreClientTravel ( const [FString](API\Runtime\Core\Containers\FString) & PendingURL, ETravelType TravelType, bool bIsSeamlessTravel )